Has anyone quantified these performance differences between full 64 bit vs 64 bit OS but 32 bit memory per process? At 8 GiB RAM, allowing a single process to

Has anyone quantified these performance differences between full 64 bit vs 64 bit OS but 32 bit memory per process? At 8 GiB RAM, allowing a single process to "only" use half of the available RAM really doesn't seem too limiting for most workflows. Especially considering that there's 4 CPU cores. If it's a notable hassle-free performance improvement it seems like a no-brainer for most use cases.